LeConte.] 



ERIRHINIXI. . 169 



with dark-brown scales; the prothorax has four whitish vittis; the elytra a 

 short basal line on each, and some narrow irregular whitish bands ; the 

 sides of the prothorax are niuch rounded and incurved at the base. The 

 scales at the base of the beak form two little tufts as in the next species. 



2. P. discoideus, n. sp. 



Robust, black, clothed with white scales ; disc of prothorax and elytra 

 brown. Beak longer than head and thorax, not slender, curved, strongly 

 punctured, not thickened towards the base, which is deeply transversely 

 impressed; the scales form two small tufts near the transverse impression. 

 Prothorax wider than long, very much narrowed in front, strongly rounded 

 on the sides, which are incurved near the base, though less so tlian in P. 

 amoeiius, coarsely and densely punctured ; disc brown for two-thirds the 

 length, and one-half the width ; with a whitish basal vitta. Elytra Avider 

 than prothorax, rounded on the sides, though less so than in the preceding; 

 humeri rounded, but somewhat prominent ; striae fine, interspaces flat. 

 Thighs clavate, claws connate for about one-half the length. Length 2.5 

 mm. ; .10 inch. 



New York, Illinois, Texas, and California. The discoidal spot of the 

 elytra extends from the base for half the length and breadth; there is 

 frequently a black lateral spot on the elytra, just behind the ii\iddle. 



SMICRONYX Sch. 



• 



This genus contains small species which only differ from PachytycMus 

 by the second joint of the funicle being shorter than the first, and 

 frequently not longer than the third ; the scape reaches to the eyes. The 

 postocular lobes of the prothorax are sometimes distinct, and the proster- 

 num is moderately emarginate in front. The beak is shorter than in 

 Desmoris, and is slightly thicker at base ; the transverse constriction is 

 well defined, and the pubescence at the base of the beak rises into two 

 tufts. 



The form varies somewhat, the fir^ species resembles Pacliy.tijcJiiu!i by 

 the strongly rounded sides of prothorax and ovate elytra ; others resemble 

 in miniature Dorytomun, but the thighs are not toothed, and the claws are 

 small and connate almost to the tips. Others again have the claws approxi- 

 -mate, but scarcely connate. 



The genus, even as thus defined, seems to me somewhat heterogeneous, 

 and with more careful study will be found perhaps, to contain elements 

 representing other European genera. It will be for future investigators to 

 determine if our species shall be partitioned, or the European forms con- 

 densed. 



The species are difliicult to define, and the table given is not very satis- 

 factory. 



Second joint of funicle of antennae not longer than third ; claws 



connate for more than half the length 2. 



Second joint of funicle of antennae longer than third; claws not 

 connate, or feebly so . . . 7. 



PROC. AMER. PHILOS. SOC. XV. 96. V 



